Improvement in saw-mill dogs



J. LITTLE. Saw

-M i11 Dog.

No. 221,176. Patented Nov. 4, I879."

S E S S E N H W ATTORNEY N.FETERS, PHQTO LWHOGRAFHERl WASHINGTON. D C.

ITED STATES PATENT FFICE.

JAMES LITTLE, OF EVANSVILLE, INDIANA, ASSIGNOR OF ONE-HALF OF HIS RIGHTTO SAMUEL W. LITTLE, OF SAME PLACE.

IMPROVEMENT lN SAW-MILL DOGS.

Specification forming part of Letters Patent No. 22] [76, dated November4, 1879; application liled Jui 'e, 1879.

To all whom it may concern:

Beit known thatI, JAMES LITTLE, of Evansville, in the county ofVanderburg and State of Indiana, have invented certain. new and usefulImprovements in Saw-Mill Dogs; andI do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and toletters of reference marked thereon, which form a part of thisspecification.

This invention relates to an improved device for securing logs or lumberto the traveling carriage usually employed in lumber-saw ing machineryto carry the log forward to the saw; and it consists in a rack mountedupon a standard, adapted to be secured in any convenient manner to thetraveling carriage of a sawing-machine, and provided with a slidingframe having a gear-wheel adapted to work in said rack, and operated bymeans of a lever, provided with a pawl, by means of which saidratchet-wheel may be held or released'at will, the said sliding framecarrying an adjustable sliding rod, having at one end a spike, whichis'forced into the wood or log by depressing the sliding frame by meansof the ratchetwheel and lever, as more fully hereinafter specified.

In the drawings, Figure 1 represents a front elevation of my improveddevice, Fig. 2, a side elevation of the same, and Fig. 3 a detachedsectional view of the gear-wheel and lever for operating the slidingframe.

The letter A indicates a rack mounted upon a standard, B, which isprovided with a tongue, 0, on its bottom, which may be secured in agroove in the traveling carriage-of a sawingmachine, so as to supportthe rack in a vertical position. The letter D indicates a sliding framesecured upon the rack and adapted to travel back and forth thereon. Eindicates a gear-wheel, the teeth of which intermesh with the teeth ofthe rack A. Said wheel is mounted on a shaft, F, journaled in standardsGformed on the sliding frame D.

The letter H indicates alever pivoted to the shaft F, upon which thegear-wheel E is mounted. Said lever is hollow, and contains a pawl, I,which is kept forward in a normal position by means of a spiral spring,K, so as to engage the teeth of the gear-wheel and hold it in suchmanner that when the lever is operated it will carry the wheel with itand depress the sliding frame, as more fully hereinafter ex plained.

The letter L indicates a sleeve surrounding the lever at one end, andprovided with an inclined slot, M, in which sets a stud or pin, N,secured to the pawl I, said pin projecting through a longitudinal slotin the lever in such manner that, when the sleeve is turned in theproper direction, the pawl will be withdrawn from the gear-wheel,permitting the lever to be elevated without elevating the sliding frame.

The letter 0 indicates a pawl or dog pivoted to the upper edge of thesliding frame, and adapted to engage the rack-teeth and hold the framein position as it is depressed.

The letter P indicates a sliding beam or bar, adapted to be advanced ordrawn back horizontally, and provided with a series of slots, R, at itslower edge. Said bar is secured in a transverse recess in the slidingframe, which hassecured to it, at one side, a spring-pawl, S, which isadapted to set in one of the slots R .and secure the beam or bar in anyposition to which it may be adjusted. The forward end of said bar orbeam is provided with a wedge-shaped spike, which is forced into the logor lumber on the traveling carriage, to which the device is attached, bydepressing the lever, which in turn depresses the traveling carriage,with the bar or beam, and its spike, with great force.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

l. The herein-described saw-mill dog, consisting of the rack A, asliding frame mounted on said rack and carrying an adjustable bar andspike, the gear-wheel E, and the slotted lever H, provided with aninterior spring pawl for engaging with said gear-wheel, substantially inthe manner herein shown and described.

2. In combination with the rack and gear- In testimony that I claim theforegoing I wheel, and the sliding frame, a hollow lever have hereuntoset my hand this 19th day of carrying a pawl, held in a normal positionby June, 1879. I means of a spring, and the hollow sleeve provided withan inclined slot for reeeivin g a pro- JAMES LITTLE. jcction on the pawlextending through a slot in the hollow lever, whereby the pawl maybeVitnesses: operated to release the ratchet-wheel snbstan- T. MOTERNAN,tially as specified. J AMES PALMER.

